KR19980024289A - Use of Silane Grafted Amorphous Poly-α-olefin as Moisture Crosslinkable Adhesive Substrate or Adhesive - Google Patents

Abstract

According to the invention, (a) the grafted silane has at least one olefinic double bond and one to three alkoxy groups directly bonded to silicon,

(b) When the adhesive used contains mainly amorphous poly-α-olefins silane grafted, which is crosslinked by water after adhesion, an adhesive layer having high adhesion, cohesion and thermal stability is obtained.

Description

Use of Silane Grafted Amorphous Poly-α-olefin as Moisture Crosslinkable Adhesive Substrate or Adhesive

The present invention relates to construction, woodworking and automotive as a moisture-crosslinking adhesive base material or as a component of a moisture crosslinkable adhesive system, in particular in which the adhesive is mainly used as a hotmelt adhesive. It relates to the use of certain silane-grafted amorphous poly-α-olefins for application in industry.

Amorphous poly-α-olefins are widely applied and used as adhesive substrates. The field of application extends from the field of hygiene through to lamination and packaging adhesives, to construction adhesives and applications in woodworking. In most of these applications, the adhesive substrate is notable for its high adhesion to various supports, strong cohesion and good chemical resistance, with an excellent price / performance ratio.

Many applications in need, such as glass, ceramics, metals and various polymer mixtures, can be used to tackify adhesive substrates with amorphous poly-α-olefins, tackifier resins, waxes, other polymers, plasticizers and stabilizers. It can be realized in a specific range by combining with a plurality of components and additives, such as. Nevertheless, reaching the required level of adhesion and cohesion is not possible in all cases. In addition, the thermal stability of adhesives with amorphous poly-α-olefins or formulations based on these supports is unsuitable for certain applications, and in many cases users are more expensive, reactive adhesive systems, such as polyurethane, epoxy or silicone adhesives. You must rely on.

German Patent Application No. 40 00 695 describes amorphous poly-α-olefins grafted with reactive monomers and used as hotmelt adhesives and in durable carpet application compositions. Because of their low level of molecular heterogeneity by their preparation, these grafted poly-α-olefins have improved cohesion. However, for strong adhesion, the resulting cohesive force is still inadequate. In addition, there is no significant improvement in terms of thermal stability.

In order to improve the cohesion and thermal stability of the adhesive film, it is also necessary for a chemical bond to be formed between the polymer chains of the adhesive film. Such a system is described in German Patent Application No. 195 16 457. However, the system described in this document consists of two different polymer components, one of which is a silane grafted polyolefin, such as an ethylene-vinyl acetate (EVA) copolymer, and the other maleic anhydride with a crosslinking accelerator added. (MAA) grafted polyolefins such as EVA. Handling of multicomponent systems is labor intensive because of the absolutely essential two components and the resulting logistic and mixing efforts. In addition, the toxicological properties of the MAA grafted systems make them unsuitable for use in the plant field, which further defines the area of use of the claimed systems in such applications.

Surprisingly, when adhesives comprising silane grafted, mainly amorphous poly-α-olipines according to the invention are used, adhesives with high adhesion, compactness and thermal stability are obtained, and after being glued, the adhesive is It has been found that the silane grafted during processing has at least one olefinic double bond and one to three alkoxy groups are bonded directly to silicon.

The predominantly amorphous poly-α-olefins are homogeneous copolymers or copolymers, for example atactic polypropylene (APP), atactic poly-1-butene or, preferably, the following monomer composition,

0-95 wt% (preferably 3-95 wt%) of α-olefins having 4 to 10 carbon atoms,

5 to 100 weight percent propene (preferably 5 to 97 weight percent) and

It may be a copolymer or ternary copolymer having 0 to 20% by weight of ethene.

Mostly amorphous poly-α-olefins are completely amorphous or have only low crystallinity. Typically, the crystallinity should not exceed 25% as measured by X-ray diffraction.

The grafted silane preferably has three alkoxy groups bonded directly to silicon. Examples thereof include vinyltrimethoxysilane (VTMO), vinyltriethoxysilane, vinyl tris (2-methoxyethoxy) silane, 3-methacryloxypropyltrimethoxysilane [MEMO; H ₂ C═C (CH ₃ ) COO (CH ₂ ) ₃ —Si (OCH ₃ ) ₃ ], 3-methacryloxypropyltriethoxysilane, vinyldimethylmethoxysilane and vinylmethyldibutoxysilane. Silanes are usually used to graft in an amount of 0.1 to 10% by weight, preferably 0.5 to 5% by weight, based on the poly-α-olefin.

Unsaturated silanes can be grafted onto predominantly amorphous poly-α-olefins using a suitable amount of free radical donor, for example in a prior art method, for example in solution or, preferably, in a melt. One suitable technique is described in German Patent Application No. 40 00 695, which is specifically incorporated herein by reference. Examples of free radical donors that can be used are diacyl peroxides such as dilauryl peroxide or didecanoyl peroxide, alkyl peresters such as tert-butyl peroxy-2-ethylhexanoate, 1,1-di Perketal, tert-butyl cumyl peroxide, di (3) such as (tert-butylperoxy) -3,3,5-trimethylcyclohexane or 1,1-di (tert-butylperoxy) cyclohexane Dialkyl peroxides such as tert-butyl) peroxide or dicumyl peroxide, C-radical donors such as 3,4-dimethyl-3,4-diphenylhexane or 2,3-dimethyl-2,3 -Diphenylbutane and azo compounds such as, for example, 2,2'-azodi (2-acetoxypropane).

In order to increase the rate of crosslinking, it is possible to add crosslinking accelerators, usually organotin compounds such as, for example, dibutyltin dilaurate, to silane grafted, mainly amorphous poly-α-olefins. This addition can be carried out in pure form or in the form of a master batch containing any necessary poly-α-olefins, in order to be much easier to measure. The promoter may be added before melting, in the form of a dry mixture, or after melting. At this time, the content is found to be 0.001 to 20% by weight, preferably 0.01 to 5% by weight.

Alternatively, it is possible to reduce the rate of crosslinking and / or increase the stability upon storage by adding rapidly hydrolyzing silanes such as grafted hexadecyltrimethoxysilane or hexadecyltriethoxysilane. Do. At least some of the water that diffuses into the adhesive film is blocked by these silanes, requiring longer time for the water needed to crosslink the silane grafted poly-α-olefin to be available in the adhesive film. For this purpose it is recommended to use silanes with long-chain alkyl radicals, as the product melts without evaporation and as a result is not lost as an active substance and furthermore does not cause any waste disposal or workplace hygiene problems. Deserved

Whether the use of a crosslinking accelerator or crosslinking retardant is necessary for one of the claimed applications can be quickly determined by one skilled in the art on the basis of several guideline experiments.

To achieve the desired adhesive properties for silane grafted poly-α-olefins, to achieve the properties required for adhesive users, such as adhesive strength, initial tack, viscosity, hardness, elasticity, thermal stability and stability to oxidation, etc. Further materials used as, for example, tackifier resins (about 0.1 to 50% by weight), waxes (about 0.1 to 50% by weight), other polymers (about 0.1 to 80% by weight), plasticizers (about 0.1 to 20% by weight) and, in addition, conventional polymer additives, such as thermal stabilizers and light stabilizers, fluorescent brighteners, antistatic agents, lubricants and anti-sticking agents, nucleating agents, fillers and dyes, pigments and flame retardants It is possible to add. It should be noted, of course, that the water present in the additive can increase the crosslinking speed of the adhesive.

In addition to the conventional adhesives, the adhesives should in this case comprise at least 5% by weight, preferably at least 10% by weight of silane grafted poly-α-olefins. However, silane grafted poly-α-olefins can of course be used without any addition.

Examples of suitable tackifier resins include synthetic terpene resins, modified terpene resins, aliphatic hydrocarbon resins, fully or partially hydrogenated rosin glycerol ester resins, liquid resins, hydrogenated cyclic hydrocarbon resins, aliphatic-aromatic hydrocarbon resins, colophonyl resins Hydrogenated pentaerythritol esters, or aromatically modified hydrocarbon resins. As wax, in principle all conventional types can be used. Suitable examples are microcrystalline waxes, synthetic waxes of the Fischer-Tropsch or polyolefin type, and fully refined waxes and amide waxes. Other suitable polymers are mainly rubber, in particular butyl rubber or SEBS (partially hydrogenated styrene-butadiene-styrene block copolymers) or polyolefins, wherein the polyolefins used are mainly isotactic polypropylenes and / or amorphous poly-α -Olefin. Suitable plasticizers are paraffinic or naphthenic petroleum, and low molecular mass poly-1-butene or polyisobutene.

The silane grafted amorphous poly-α-olefin is a pure substance or at a temperature of from 50 to 300 ° C, preferably from 100 to 200 ° C, particularly preferably from 130 to 180 ° C, to the support to be adhered to in the form of the formulations indicated above. It is applied in the form of a melt. This includes rollers, slot dies, knife coatings, dotwise applications, multiline applications, rotary application, and swirling techniques. Various application techniques can be used over a large area, such as by spray application by means of, or by melt blow or air-assisted spray techniques. The support is subsequently connected within the so-called opening time and the duration of the opening time depends on the composition of the applied mixture. If the applied adhesive is maintained at the application temperature by preheated support, rollers or the like or by radiation, a longer time can of course be used for bonding the support.

The system is crosslinked by water and, depending on the needs of the user and the nature of the support, this is achieved by treatment with running water or hot water, by water vapor from ambient air, or by water present in the support.

Using the adhesive according to the invention, it is possible to adhere various materials in all possible formulations and in all processed forms, for example films, sheets, fabrics and the like. The following materials may be described by way of examples: polyolefins (particularly polyethylene, polypropylene, poly-1butene), polystyrene, polyvinyl chloride, polycondensates (particularly polyesters, polyamides, polyurethanes), rubbers ( For example, EPM, EPDM, NBR, SBS, SBR, BR, natural rubber, butyl rubber, chloroprene rubber, silicone rubber), wood, cellulose materials, paper and all kinds of cardboard packaging, fiberboard, Metals (including iron, steel, stainless steel, aluminum, brass and copper), glass, ceramics and concrete.

Here, extremely strong adhesion is obtained, especially with respect to the support whose surface has OH groups. Unexpectedly, the adhesion to plastics has also increased, which is typically difficult to bond using amorphous poly-α-olefins.

As a type of hotmelt adhesive, these adhesives exhibit an initial tack that makes it possible to eliminate deposition aids in a few minutes after application.

The invention is described through examples.

Example 1:

The following monomer composition,

6% by weight of ethene,

64% by weight of propene and

30-% by weight of predominantly amorphous poly-α-olefin (APAO) is used.

In a twin screw extruder (Berstorff ZE 40)

92.9% by weight of the APAO,

6.0 wt% of vinyl trimethoxysilane (DYNASILAN ^R VTMO) and

The mixture consisting of 1.1% by weight of dicumyl peroxide is mixed at a temperature of 155-160 ° C. in the absence of air and humidity, and maintained at this temperature for a residence time of about 90 seconds. In the final zone of the extruder, excess VTMO is evaporated under vacuum of about 20 mbar and condensed in a cold trap. The product is stabilized by the addition of IRGANOX 1076.

The properties of the starting materials and products are shown in the following table.

characteristic How to measure unit APAO Reaction product Melt Viscosity at 190 ° C According to DIN 53019 (shear speed 30.5 [1 / s]) mPas About 50,000 About 6000 Softening point (round and ball) According to DIN 52011 ℃ 107 98 Needle penetration (100/25/5) According to DIN 52010 0.1 mm 14 15 Molecular Mass M _n M _w U GPC according to DIN 55672 g / mol 18,10092,0004.1 10,60038,0002.6

Example 2:

The silane grafted amorphous poly-α-olefin from Example 1 is melted in a drying oven at 170 ° C. under N ₂ atmosphere for 1 hour, and then the melt is applied to wood test pieces at a temperature of 170 ° C. The specimens are joined to another wooden specimen by overlapping one part over an area of 4 cm 2 within 0.5 minutes, and the specimens are pressed together with a weight of 2 kg for 5 minutes. The adhesive sample is then stored for 14 days at 23 ° C. and 60% relative atmospheric humidity before the tensile test and thermal stability test. Table 1 shows the results of these measurements.

Example 3:

The silane grafted amorphous poly-α-olipines from Example 1 are melted in a drying oven at 170 ° C. under N ₂ atmosphere for 1 hour. Then 5% by mass of accelerator in the form of a master batch comprising 98% by weight of amorphous poly-α-olipine (VESTOPLAST ^R 708) and 2% by weight of dibutyltin dilaurate are added. After the melt has been homogenized, the mixture is applied to the wooden test pieces at a temperature of 170 ° C. This test piece is bonded to another wood test piece by the method described in Example 2, and the bonded test piece is stored and tested. Table 1 shows the results of the measurements.

Example 4 (Not in accordance with the present invention)

Two wood test pieces are bonded in the manner described in Example 2 using an unfunctionalized amorphous poly-α-olefin VESTOPLAST ^R 708, and the bonded test pieces are stored and tested. Table 1 shows the results of these measurements. The amorphous poly-α-olefins used are very similar to the silane grafted amorphous poly-α-olefins used in Example 3 in terms of monomer composition and melt viscosity of the hydrocarbon chain.

Example 5:

The silane grafted amorphous poly-α-olefin from Example 1 is melted by the method described in Example 2 and applied to the glass test piece degreased using acetone at a temperature of 150 ° C. The coating is bonded to another glass plate which is not degreased by overlapping one part over an area of 4 cm 2 within 0.5 minutes, and the glass test pieces are pressed against each other for 5 minutes at a weight of 2 kg. The bonded sample is then stored for 20 days at 23 ° C. and 60% relative atmospheric humidity before the tensile test and the thermal stability test. Table 1 shows the results of these measurements.

Example 6:

The silane grafted amorphous poly-α-olefins from Example 1 and the master batch described in Example 3 were mixed by the method described in Example, and the mixture was applied to acetone degreased glass test pieces at a temperature of 150 ° C. This test piece is bonded to another glass test piece by the method described in Example 5, and the bonded test piece is stored and tested. Table 1 shows the results of the measurements.

Example 7 (Not in accordance with the present invention):

Two glass specimens degreased using an unfunctionalized amorphous poly-α-olefin VESTOPLAST ^R 708 are bonded in the manner described in Example 5, and the bonded specimens are stored and tested. Table 1 shows the results of these measurements.

Example 8:

The silane grafted amorphous poly-α-olefin from Example 1 is melted by the method described in Example 2 and applied to a polyethylene test piece at a temperature of 150 ° C. The coating was bonded to a polyamide 6,6 test piece by overlapping one part in an area of 4 cm 2 within 30 seconds, and the two test pieces were pressed together for 110 minutes at a weight of 2 kg. The bonded sample is then stored for 24 hours at 23 ° C. and 60% relative atmospheric humidity before the tensile test and thermal stability test. Table 1 shows the results of these measurements.

Example 9:

The silane grafted amorphous poly-α-olefin from Example 1 and the master batch described in Example 3 were mixed by the method described in Example, and the mixture was applied to the polyethylene test specimen at a temperature of 150 ° C. This test piece is bonded to the polyamide 6,6 test piece by the method described in Example 8, and the bonded test piece is stored and tested. Table 1 shows the results of the measurements.

Example 10 (not in accordance with the present invention):

Polyethylene test pieces are applied using amorphous poly-α-olefin VESTOPLAST ^R 708 not functionalized by the method described in Example 8, bonded to polyamide 6,6 test pieces, and the test pieces are stored and tested. Table 1 shows the results of these measurements.

Example 11:

The silane grafted amorphous poly-α-olefin from Example 1 is melted by the method described in Example 2 and applied to acetone degreased ceramic test pieces at a temperature of 150 ° C. The coatings were partly overlapped over an area of 4 cm 2 within 0.5 minutes and bonded to another undegreased ceramic plate, and the ceramic test pieces were pressed together for 5 minutes at a weight of 2 kg. The adhered samples are then stored for 20 days at 23 ° C. and 60% relative atmospheric humidity before the tensile test and thermal stability test. Table 1 shows the results of these measurements.

Example 12:

The silane grafted amorphous poly-α-olefin from Example 1 and the master batch described in Example 3 were mixed by the method described in Example, and the mixture was applied to acetone degreased ceramic test specimens at a temperature of 150 ° C. This test piece is bonded to another ceramic test piece by the method described in Example 5, and the bonded test piece is stored and tested. Table 1 shows the results of the measurements.

Example 13 (Not in accordance with the present invention):

Two degreased ceramic test pieces were bonded using amorphous poly-α-olefin VESTOPLAST ^R 708, which was not functionalized by the method described in Example 5, and the test pieces were stored and tested. Table 1 shows the results of these measurements.

Example 14:

The silane grafted amorphous poly-α-olefin from Example 1 is melted by the method described in Example 2 and applied to acetone degreased ceramic test pieces at a temperature of 150 ° C. The coating is allowed to overlap with another degreased aluminum plate by overlapping one part over an area of 4 cm 2 within 30 seconds, and the bonded aluminum test pieces are pressed together for 10 minutes at a weight of 2 kg. The bonded sample is then stored for 14 days at 23 ° C. and 60% relative atmospheric humidity before the tensile test and thermal stability test. Table 1 shows the results of these measurements.

Example 15:

The silane grafted amorphous poly-α-olefins from Example 1 and the master batch described in Example 3 were mixed by the method described in Example, and the mixture was applied to acetone degreased aluminum test specimens at a temperature of 150 ° C. This specimen is bonded to another aluminum specimen in the manner described in Example 5, and the bonded specimen is stored and tested. Table 1 shows the results of the measurements.

Example 16 (Not in accordance with the present invention):

Two degreased aluminum specimens were bonded using amorphous poly-α-olefin VESTOPLAST ^R 708, which was not functionalized by the method described in Example 5, and the specimens were stored and tested. Table 1 shows the results of these measurements.

Measurement results for Examples 2-16 Example Thermal stability according to WPS 68 [℃] Tensile shear strength according to DIN 53283 [N / mm2] 2 165 2.3 3 185 3.5 4a) 75 0.7 5 b) 2.9 6 b) 3.4 7a) b) 0.1 8 b) 1.6 9 b) 1.3 10a) b) One 11 b) 3.1 12 b) 3.7 13a) b) 0.1 14 b) 0.8 15 b) 0.6 16a) b) 0.4

a) not according to the invention

b) not measured

Example 17:

The silane grafted amorphous poly-α-olefins from Example 1 are melted by the method described in Example 2 and the melt is applied to the polyethylene film using a 20 μm doctor blade at a temperature of 130 ° C. In this case the application weight is about 11 g / m 2. PA nonwoven fabric was applied to this coating and pressurized under a pressure of 500 hPa with a roller preheated to 80 ° C. The bonded sample is then stored for 24 hours at 23 ° C. and 60% relative atmospheric humidity, and then the tensile shear strength is measured according to DIN 53283. The results of this measurement are shown in Table 2.

Example 18:

Exactly corresponding to Example 3, a mixture of silane grafted poly-α-olefins and master batches is prepared. This mixture is applied to a polyethylene film using a 20 μm doctor blade at a temperature of 130 ° C. and the coating weight is about 11 g / m 2. PA nonwovens are added to this coating in the manner described in Example 17, and the deposits are stored and tested. Table 2 shows the results of these measurements.

Example 19 (Not in accordance with the present invention)

The polyethylene film is applied using amorphous poly-α-olefin VESTOPLAST ^R 708, which is not functionalized by the method described in Example 17. PA nonwovens are also added to this coating in the manner described in Example 17, and the deposits are stored and tested. Table 2 shows the results of these measurements.

Measurement results for Examples 17-19 Tensile Shear Strength according to DIN 53283 [N / mm2] Example 17 Example 18 Example 19! a) immediately after manufacture 4.0 3.0 10 b) 6 days after storage 6.0 4.0 1.5

! Not in accordance with the present invention

Example 20:

After melting in a drying oven at 140 ° C. under N ₂ atmosphere using the silane grafted amorphous poly-α-olefin from Example 1, the following components,

59 parts by weight of product from Example 1,

6 parts by weight of IPP (isotactic polypropylene, MFR approximately 70, VESTOLEN ^R P2000),

1 part by weight of HOSTAMONT TP AR 504 (maleic anhydride modified polypropylene),

8.5 parts by weight of ESCOREZ 5320 (hydrogenated cyclic hydrocarbon resin),

8.5 parts by weight of FORAL 105 (fully hydrogenated rosin ester),

1 part by weight of VISCOL ^R 550P (polypropylene wax),

Sachtleben Schwerspatmehl [barite powder] CH 1177 17 parts by weight

0.2 parts by weight of IRGANOX 1076 (stabilizer),

0.1 parts by weight of DHT-4A (secondary stabilizer) and

A mixture of 0.05 parts by weight of NAUGARD 445 (stabilizer) is prepared at a temperature of 140 ° C.

The mixture has the following properties.

Softening Point (r + b): 160 ℃

Melt viscosity at 190 ° C: 12,000 mPas

Needle penetration (100/25/5): 8 [0.1 mm]

This mixture is tested for its suitability for use as an edge adhesive adhesive (ABS for wood) in the woodworking industry. Table 3 shows the results of these measurements.

Example 21 (Not in accordance with the present invention)

In this comparative example, the mixture was prepared with the methods and compositions described in Example 20, except that the nonfunctionalized amorphous poly-α-olefin VESTOPLAST ^R 792 was used in place of the silane grafted amorphous poly-α-olefin. do. This VESTOPLAST grade is chosen because it provides a formulation with the best properties compared to other available VESTOPLAST grades.

The mixture has the following properties.

Softening Point (r + b): 160 ℃

Melt viscosity at 190 ° C .: 120,000 mPas

Needle permeability (100/25/5): 10 [0.1 mm]

The mixture is also tested for its suitability for use as an adhesive for edge bonding in the woodworking industry. Table 3 shows the results of these measurements.

Example 22:

According to Example 3, a mixture of 100 parts by weight of the composition from Example 20 and 3.4 parts by weight of masterbatch is prepared.

The mixture has the following properties:

Softening Point (r + b): 160 ℃

Melt viscosity at 190 ° C .: 9000 mPas

Needle permeability (100/25/5): 9 [0.1 mm]

This compound is also tested for its suitability for use as adhesive for edge bonding in the woodworking industry. Table 3 shows the results of these measurements.

Measurement results for Examples 20-22 Example 20 Example 21! Example 22 Thermal stability in accordance with WPS 68 165 degrees Celsius (fiber stripped from wood) 110 to 115 ℃ 165 degrees Celsius (fiber stripped from wood) Opening time 20 s 70s 21s Curing time 1 s 1 s 1 s Peeling resistance according to DIN 53 273 [N / mm] 14.6 10.0 15.4

! Not in accordance with the present invention

Example 23 Formulations for Various Polymer Layers

15 parts of amorphous poly-α-olefin (e.g., VESTOPLAST 750) with a viscosity of 50,000 mPas,

35 parts of silane grafted amorphous poly-α-olefin from Example 1,

30 parts hydrogenated cyclic hydrocarbon resin (e.g., ESCOREZ 5300),

20 parts of plasticizer (e.g. NAPVIS D 10),

0.3 part of stabilizer (e.g. IRGANOX 1076),

Auxiliary stabilizers (e.g., DHT-4A) 0.1 part,

0.05 parts of stabilizer (e.g. LOWINOX TBM-6)

Example 24 Sprayable Hot Melt Adhesives:

70 parts of silane grafted amorphous poly-α-olefin from Example 1

25 parts of hydrocarbon resin (e.g., ESCOREZ 5380)

5 parts plasticizer (e.g. NAPVIS D10)

0.4 part stabilizer (e.g. IRGANOX 1076)

Example 25 Formulations for Glass to Insulate Laminate Seal Compositions with Good Adhesion and Adhesiveness to Metals and Glass:

38 parts of silane grafted amorphous poly-α-olefin from Example 1

15 parts of amorphous poly-α-olefin (e.g. VESTOPLAST 750) with a viscosity of 50,000 mPas

1.5 parts rubber (e.g. KRATON G 1657)

30 parts plasticizer (e.g. OPPANOL B 15)

7.5 parts butyl rubber (e.g. PB 402-24)

7.5 parts plasticizer (e.g. BEVILITE 62-107)

0.4 parts carbon black (e.g. PRINTEX 60)

0.3 part stabilizer (e.g. IRGANOX 1076)

0.1 part of a secondary stabilizer (eg DHT-4A)

0.1 part stabilizer (e.g. NAUGARD 445)

Example 26 Formulations for Edge Adhesive Compositions Featuring Low Application Viscosity, Excellent Adhesion and Thermal Stability:

59 parts of silane grafted poly-α-olefin from Example 1,

5 parts isotactic PP with MFR approximately 70 (e.g. VESTOLEN P 2000)

1 part maleic anhydride modified PP (e.g. HOSTAMONT TP AR 504)

8.5 parts hydrogenated cyclic hydrocarbon resin (e.g., ESCOREZ 5320)

8.5 parts fully hydrogenated rosin glycerol esters (e.g. FORAL 105)

1 part polypropylene wax (e.g. VISCOL 550P)

Barite (e.g. Schwerspat SACHTLEBEN 1177) Part 17

0.2 part stabilizer (e.g. IRGANOX 1076)

0.1 part of a secondary stabilizer (e.g., DHT-4A) and

0.05 parts stabilizer (e.g. NAUGARD 445)

According to the present invention, an adhesive layer having high adhesion, cohesion and thermal stability is obtained.

Claims (9)

To create an adhesive bond, (a) the grafted silane has at least one olefinic double bond and 1-3 alkoxy groups directly bonded to silicon, (b) Use of an adhesive comprising a silane grafted, predominantly amorphous poly-α-olefin, wherein the adhesive is crosslinked by water after adhesion. The use of an adhesive according to claim 1, wherein the silane is used for grafting in an amount of 0.1 to 10% by weight, based on the poly-α-olefin. The grafted silane according to claim 1 or 2, wherein the grafted silane is vinyltrimethoxysilane, vinyltriethoxysilane, vinyl-tris (2-methoxyethoxy) silane, 3-methacryloxypropyltrimethoxysilane, Use of an adhesive which is 3-methacryloxypropyltriethoxysilane, vinyldimethylmethoxysilane or vinylmethyldibutoxysilane. The method of claim 1, wherein the predominantly amorphous poly-α-olefins are of atactic polypropylene, atactic poly-1-butene or monomer composition. 0-95% by weight of α-olefins having 4 to 10 carbon atoms, 5-100 wt% of propene and Use of an adhesive which is a copolymer or terpolymer of 0 to 20% by weight of ethene. 5. The poly-α-olefins of claim 4, wherein the amorphous poly-α-olefins have a monomer composition of 0-95% by weight of α-olefins having 4 to 10 carbon atoms, Propene 5 to 97% by weight and Use of an adhesive which is 0-20% by weight of ethene. The adhesive according to any one of claims 1 to 5, wherein the adhesive resin, wax, other polymers, plasticizers, stabilizers, fluorescent brighteners, antistatic agents, lubricants and anti-sticking agents, nucleating agents, fillers, dyes, pigments and / or Use of an adhesive with an additional flame retardant present. The method of claim 6, Tackifier resin (a) from 0.1 to 50% by weight and / or Wax (b) 0.1 to 50% by weight and / or 0.1-80% by weight of other polymers (c) and / or Use of an adhesive in which 0.1 to 20% by weight of plasticizer (d) is present. 8. Use of an adhesive according to any one of claims 1 to 7, wherein at least 10% by weight of silane grafted poly-α-olefin is present. The use of an adhesive according to any one of claims 1 to 8, which is a hotmelt adhesive.